Electrons collide with molecules in the air (mainly oxygen) to produce ions, which are negatively charged and are called anions. Anions are everywhere in nature, thunder and lightning, plant photosynthesis; Natural phenomena such as waterfall impacts can produce large amounts of negative ions, which is why people feel the air is particularly fresh during a thunderstorm, in a forest or near a waterfall.

The production principle of anion is mainly as follows:

1. The atmosphere is ionized by ultraviolet rays, cosmic rays, radioactive substances, thunderstorms, storms, soil and air radiation and other factors. The released electrons are absorbed by the Earth and released again, and soon combine with neutral molecules in the air to form negative ions, or anions. The natural anion (that is, the anion that plays a good role and reducing role in the body) has great antioxidant effect and reducing power.

2. Under the action of gravity, water flows at a high speed in natural processes such as waterfall impact, small waves pushing and heavy rain falling, and water molecules split to produce negative ions. Molecular transformation process of matter.

3. Forest trees, leaf tip discharge and green plant photosynthesis formed by the photoelectric effect, ionization of the air produced by negative ions.

4. Some crustal rocks can release certain negative ions.

5. Air anions are generated by artificial anion generation technology, which simulates the natural lightning and high-pressure ionized air to produce negative electrons, which are transmitted by oxygen and carbon dioxide in the air as carriers.